Buffer overflow in Siemens Apogee Modular Building Controller
CVE-2021-31882
A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303). The DHCP client application does not validate the length of the Domain Name Server IP option(s) (0x06) when processing DHCP ACK packets. This may lead to Denial-of-Service conditions. (FSMD-2021-0011)
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.015 (74.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Siemens Apogee Modular Building Controller
- Siemens Apogee Modular Building Controller Firmware
- Siemens Apogee Modular Equiment Controller
- Siemens Apogee Modular Equiment Controller Firmware
- Siemens Apogee Pxc Compact
- Siemens Apogee Pxc Compact Firmware
- Siemens Apogee Pxc Modular
- Siemens Apogee Pxc Modular Firmware
- Siemens Capital Embedded Ar Classic 431-422 — versions 0
- Siemens Capital Embedded Ar Classic R20-11 — versions 0
Weakness classification (CWE)
References
- cert-portal.siemens.com/productcert/pdf/ssa-114589.pdf (Vendor Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf (Vendor Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-620288.pdf
- cert-portal.siemens.com/productcert/html/ssa-114589.html
- cert-portal.siemens.com/productcert/html/ssa-044112.html
- cert-portal.siemens.com/productcert/html/ssa-620288.html
Frequently asked questions
- What is CVE-2021-31882?
- CVE-2021-31882 is a medium-severity vulnerability in Siemens Apogee Modular Building Controller, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.5/10. Published 2021-11-09.
- How severe is CVE-2021-31882?
- Medium severity. CVSS v3 base score is 6.5 out of 10.